﻿/* dk2Repository - Copyright (C) 2011 Daniel Kuczewski http://www.dk2.de/

 * This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */

using System.Collections.Generic;
using System.Reflection;
using dk2Repository.Interfaces;

namespace dk2Repository
{
    internal sealed class References : IEnumerable<References.Reference>
    {
        public sealed class Reference
        {
            public Reference(PropertyInfo pi, string foreignKeyColumn, string canidateKeyColumn, string prefix)
            {
                PropertyInfo = pi;
                CanidateKeyColumn = canidateKeyColumn;
                ForeignKeyColumn = foreignKeyColumn;
                Prefix = prefix;
            }

            public PropertyInfo PropertyInfo { get; private set; }
            public string Property { get; private set; }
            public string CanidateKeyColumn { get; private set; }
            public string ForeignKeyColumn { get; private set; }
            public string Prefix { get; private set; }


            public IMapping ReferenceMapping
            {
                get
                {
                    return MappingFactory.GetMappingInfo(PropertyInfo.PropertyType);
                }
            }


            public object GetReferenceItem(object item)
            {
                return PropertyInfo.GetValue(item, null);
            }

            public void SetReferenceItem(object item, object value)
            {
                PropertyInfo.SetValue(item, value, null);
            }
        }

        private readonly Dictionary<string, Reference> _references;
        
        public References()
        {
            _references = new Dictionary<string, Reference>();
        }

        public void Add(Reference referencee)
        {
                _references.Add(referencee.Prefix, referencee);
        }

        public bool Contains(string prefix)
        {
            return _references.ContainsKey(prefix);
        }


        public Reference this[string prefix]
        {
            get
            {
                return _references.ContainsKey(prefix) ? _references[prefix] : null;
            }
        }

        public IEnumerator<Reference> GetEnumerator()
        {
            return _references.Values.GetEnumerator();
        }

        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
        {
            return GetEnumerator();

        }

    }
}